kivy:

* improve settings dialog
 * add fx_dialog

gui/kivy/uix/dialogs/fx_dialog.py

@@ -0,0 +1,132 @@
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+
+Builder.load_string('''
+<FxDialog@Popup>
+    id: popup
+    title: 'Fiat Currency'
+    size_hint: 0.8, 0.8
+    pos_hint: {'top':0.9}
+    BoxLayout:
+        orientation: 'vertical'
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.1
+            Label:
+                text: _('Enable')
+                height: '48dp'
+            CheckBox:
+                height: '48dp'
+                id: enabled
+                on_active: popup.on_active(self.active)
+
+        Widget:
+            size_hint: 1, 0.1
+
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.1
+            Label:
+                text: _('Source')
+                height: '48dp'
+            Spinner:
+                height: '48dp'
+                id: exchanges
+                on_text: popup.on_exchange(self.text)
+
+        Widget:
+            size_hint: 1, 0.1
+
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.1
+            Label:
+                text: _('Currency')
+                height: '48dp'
+            Spinner:
+                height: '48dp'
+                id: ccy
+                on_text: popup.on_currency(self.text)
+        Widget:
+            size_hint: 1, 0.2
+
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.2
+            Button:
+                text: 'Cancel'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release: popup.dismiss()
+            Button:
+                text: 'OK'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release:
+                    root.callback()
+                    popup.dismiss()
+''')
+
+
+from kivy.uix.label import Label
+from kivy.uix.checkbox import CheckBox
+from kivy.uix.widget import Widget
+from kivy.clock import Clock
+
+from electrum.plugins import run_hook
+from functools import partial
+
+class FxDialog(Factory.Popup):
+
+    def __init__(self, app, plugins, config, callback):
+        Factory.Popup.__init__(self)
+        self.app = app
+        self.config = config
+        self.callback = callback
+        self.plugins = plugins
+        p = self.plugins.get('exchange_rate')
+        self.ids.enabled.active = bool(p)
+
+    def on_active(self, b):
+        if b:
+            p = self.plugins.enable('exchange_rate')
+            p.init_kivy(self.app)
+            values = sorted(p.exchanges.keys())
+            text = p.exchange.name()
+        else:
+            self.plugins.disable('exchange_rate')
+            values = []
+            text = ''
+        Clock.schedule_once(partial(self.add_exchanges, values, text), 0.1)
+
+    def add_exchanges(self, values, text, dt):
+        ex = self.ids.exchanges
+        ex.values = values
+        ex.text = text
+
+
+    def on_exchange(self, text):
+        if not text:
+            return
+        p = self.plugins.get('exchange_rate')
+        if p and text != p.exchange.name():
+            p.set_exchange(text)
+        Clock.schedule_once(self.add_currencies, 1)
+
+    def add_currencies(self, dt):
+        p = self.plugins.get('exchange_rate')
+        currencies = sorted(p.exchange.quotes.keys()) if p else []
+        self.ids.ccy.values = currencies
+        my_ccy = p.get_currency() if p else None
+        if currencies:
+            self.ids.ccy.text = my_ccy if my_ccy in currencies else currencies[0]
+
+    def on_currency(self, ccy):
+        if not ccy:
+            return
+        p = self.plugins.get('exchange_rate')
+        if p and ccy != p.get_currency():
+            p.set_currency(ccy)
+        self.app.fiat_unit = ccy